interview by OLIVIER ZAHM portrait by ANNE DENIAU pictures by STÉPHANE FEUGÈRE The flamboyant rascal of British design continues to mine the veins of his cultural heritage — from Gainsborough to The New Romantics — in his search for the New Silhouette. Never one to acquiesce to the status quo, he now takes fashion psychologically and sensually deeper. The astonishingly beautiful clothes of his Summer 2007 collection invoke the grace, elegance, and underlying sexuality of bygone eras, as if to mask in fragile beauty the violent masochism of today. OLIVIER ZAHM — Should I call you Alexander or Lee? ALEXANDER MCQUEEN — Lee is OK. OLIVIER ZAHM — How do you feel, Lee? ALEXANDER MCQUEEN — Exhausted! OLIVIER ZAHM — You have a lot of work? ALEXANDER MCQUEEN — For the moment we’re working on the pre-collection for the women’s and men’s shows. It’s a hard season because everyone…